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Need to calculate two things in order to answer the question:

1) Total cost of Nisha's 70 guests.

2) Total cost of Dipen's 'one-fifth fewer' guests.

For Nishen...

Distance is a scalar, meaning it only has a magnitude. Displacement is a vector, meaning that it has both magnitude and direction. For instance, distance can state that I am "x" metres away f...

We can immediately see that more than differentiation rule will be needed here. The expression in question is the product of two smaller expressions, so the product rule may be useful. But to apply the...

This is a commonly asked question in medical interviews, however several people struggle to come up with a strong answer. 

Analysing quotes can be tricky, especially when you don't know where to begin. However, specific word analysis is the area that can get you the most marks and push into the upper grade boundaries an in...